<template>
  <div class='home-category' @mouseleave="categoryId=null">
    <ul class="menu">
      <li :class="{active:categoryId===item.id}" v-for="item in menuList" :key="item.id" @mouseenter="categoryId=item.id">
        <RouterLink :to="`/category/${item.id}`">{{item.name}}</RouterLink>
        <template v-if="item.children">
        <RouterLink v-for="sub in item.children"
         :key="sub.id"
         :to="`/category/sub/${sub.id}`">
         {{ sub.name }}</RouterLink>

        </template>
        <!-- 骨架-->
        <template v-else>
        <XtxSkeleton width="60px" height="18px" style="margin-right:5px" bg="rgba(255,255,255,0.2)" />
        <XtxSkeleton width="50px" height="18px" bg="rgba(255,255,255,0.2)"/>
        </template>
      </li>
    </ul>
    <!--弹层-->
        <!-- 弹层 -->
    <div class="layer">
      <h4>{{currCategory&&currCategory.id==='brand'?'品牌':'分类'}}推荐 <small>根据您的购买或浏览记录推荐</small></h4>
      <!--商品-->
      <ul v-if="currCategory && currCategory.goods">
        <li v-for="item in currCategory.goods" :key="item.id">
          <RouterLink to="/">
            <img :src="item.picture" alt="">
            <div class="info">
              <p class="name ellipsis-2">{{item.name}}</p>
              <p class="desc ellipsis">{{item.desc}}</p>
              <p class="price"><i>¥</i>{{item.price}}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
      <!--品牌-->
      <ul v-if="currCategory && currCategory.brands">
  <li class="brand" v-for="brand in currCategory.brands" :key="brand.id">
    <RouterLink to="/">
      <img :src="brand.picture" alt="">
      <div class="info">
        <p class="place"><i class="iconfont icon-dingwei"></i>{{brand.place}}</p>
        <p class="name ellipsis">{{brand.name}}</p>
        <p class="desc ellipsis-2">DW品牌闪购</p>
      </div>
    </RouterLink>
  </li>
</ul>
    </div>
  </div>
</template>

<script>
import { computed, reactive,ref } from 'vue'
import { useStore } from 'vuex'
import {findBrand} from '@/api/home'
export default {
  name: 'HomeCategory',
  setup (){
      const store=useStore()
      //最终使用的数据=9个分类()+1个品牌
      const brand= reactive({
          id:'brand',
          name:'品牌',
          children:[ {id:'brand-childeren',name:'品牌推荐'} ],
          //品牌列表
          brands:[]
      })
      const menuList=computed(()=>{
          //得到9个分类且每个一级子分类只有两个
          const list=store.state.category.list.map(item=>{
              return{
                  id:item.id,
                  name:item.name,
                  children:item.children && item.children.slice(0,2),
                  goods:item.goods
              }
          })
          list.push(brand)
          return list
      })

      //得到弹出层的推荐商品数据
      const categoryId=ref(null)
        const currCategory=computed(()=>{
            return menuList.value.find(item=>item.id===categoryId.value)
        })
        //获取品牌数据,尽量不要使用async在setup上
        findBrand().then(data=>{
            brand.brands=data.result
        })
      return { menuList,categoryId,currCategory }
  }
}
</script>

<style scoped lang='less'>
.home-category {
  width: 250px;
  height: 500px;
  background: rgba(0,0,0,0.8);
  position: relative;
  z-index: 99;
  .menu {
    li {
      padding-left: 40px;
      height: 50px;
      line-height: 50px;
      &:hover,&.active {
        background: @xtxColor;
      }
      a {
        margin-right: 4px;
        color: #fff;
        &:first-child {
          font-size: 16px;
        }
      }
    }
  }
  /*弹出层样式*/
    .layer {
    width: 990px;
    height: 500px;
    background: rgba(255,255,255,0.8);
    position: absolute;
    left: 250px;
    top: 0;
    display: none;
    padding: 0 15px;
    h4 {
      font-size: 20px;
      font-weight: normal;
      line-height: 80px;
      small {
        font-size: 16px;
        color: #666;
      }
    }
    ul {
      display: flex;
      flex-wrap: wrap;
      li {
        width: 310px;
        height: 120px;
        margin-right: 15px;
        margin-bottom: 15px;
        border: 1px solid #eee;
        border-radius: 4px;
        background: #fff;
        
       
        &:nth-child(3n) {
          margin-right: 0;
        }
        a {
          display: flex;
          width: 100%;
          height: 100%;
          align-items: center;
          padding: 10px;
          &:hover {
            background: #e3f9f4;
          }
          img {
              width: 95px;
              height: 95px;
          }
          .info {
            padding-left: 10px;
            line-height: 24px;
		    width: 190px;
            .name {
              font-size: 16px;
              color: #666;
            }
            .desc {
              color: #999;
            }
            .price {
              font-size: 22px;
              color: @priceColor;
              i {
                font-size: 16px;
              }
            }
          }
        }
      }
        /*品牌的样式*/
          li.brand {
        height: 180px;
        a {
          align-items: flex-start;
          img {
            width: 120px;
            height: 160px;
          }
          .info {
            p {
              margin-top: 8px;
            }
            .place {
              color: #999;
            }
          }
        }
      }
    }
  }
  &:hover {
    .layer {
      display: block;
    }
  }
}
/*骨架动画*/
.xtx-skeleton {
  animation: fade 1s linear infinite alternate;
}
@keyframes fade {
  from {
    opacity: 0.2;
  }
  to {
    opacity: 1;
  }
}
</style>